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Simplifying 3(b + 7) = 3(b + -4) Reorder the terms: 3(7 + b) = 3(b + -4) (7 * 3 + b * 3) = 3(b + -4) (21 + 3b) = 3(b + -4) Reorder the terms: 21 + 3b = 3(-4 + b) 21 + 3b = (-4 * 3 + b * 3) 21 + 3b = (-12 + 3b) Add '-3b' to each side of the equation. 21 + 3b + -3b = -12 + 3b + -3b Combine like terms: 3b + -3b = 0 21 + 0 = -12 + 3b + -3b 21 = -12 + 3b + -3b Combine like terms: 3b + -3b = 0 21 = -12 + 0 21 = -12 Solving 21 = -12 Couldn't find a variable to solve for. This equation is invalid, the left and right sides are not equal, therefore there is no solution.
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